Git error:unable to unlink old (Permission denied)

Today, when using idea git to switch branches with such errors, will cause the switch branch failed, forced to switch, and did not succeed, because the file did not switch successfully,

After searching, it may be that the file was occupied by a process, not released, I suspect that the idea of a process occupied, so decisively quit idea, using git bash to switch branches,

It worked

Summary: When using git to encounter such a problem, first consider that a file is not occupied by other processes, if occupied, kill the process in check out,

Git error:unable to unlink old (Permission denied)